DPST-1NO/1NC Limit Switches

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-22° F to 158° F

-13° F to 185° F

-10° F to 185° F

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23 Products

Manual-Reset Safety Limit Switches


Style A	Style B	Style C

Prevent equipment from automatically restarting—these switches must be manually reset each time they're actuated. Pull the knob to reset. Positive-force contacts open the circuit when actuated, even if a spring fails or the contacts stick. These switches send a signal to your circuit when an object hits the actuator—for instance, a box on a conveyor runs into the switch, stopping the conveyor. They open and close circuits as fast as snap-acting switches, but they have a bigger actuator for large objects.

Rated IP67, these switches seal out water if they’re washed down or briefly submersed.

Style B—Style B have a roller lever actuator that allows parts to glide across the actuation surface with minimal friction.

Style C—Style C have a roller lever actuator that allows parts to glide across the actuation surface with minimal friction. You can also adjust the actuator's height, making it easier to align the switch with the target during installation.

											Housing
	Style	No. of Circuits Controlled	Switch Starting Position	Switch Action	Switch Designation	Switching Current @ Voltage	Max. Voltage	Operating Temp. Range, ° F	Actuator Ht.	No. of Terminals	Lg.	Ht.	Dp.	Housing Material	Conduit Thread Size	Enclosure Rating		Each
Plunger Actuator







				Screw-Terminal Wire Connection

				A	2	1 Off and 1 On	Maintained	DPST-1NO/1NC	10 amp @ 240V AC, 2.5 amp @ 125V DC	300V AC 250V DC	-22 to 158	1"	4	1.2"	3.4"	1.2"	Plastic	M20	IP67	0000000	000000


				Roller Lever Actuator







								Screw-Terminal Wire Connection

								B	2	1 Off and 1 On	Maintained	DPST-1NO/1NC	10 amp @ 240V AC, 2.5 amp @ 125V DC	300V AC 250V DC	-22 to 158	2.4"	4	1.2"	3.4"	1.2"	Plastic	M20	IP67	0000000	00000


								C	2	1 Off and 1 On	Maintained	DPST-1NO/1NC	10 amp @ 240V AC, 2.5 amp @ 125V DC	300V AC 250V DC	-22 to 158	2.1" to 3.9"	4	1.2"	3.4"	1.2"	Plastic	M20	IP67	0000000	000000

Build-Your-Own Limit Switches

Combine an actuator and a switch to assemble the exact limit switch you need. These switches have the rapid-closing action of a snap-acting switch, but have a larger actuator for large objects. When an object in motion comes into contact with the actuator, it sends a signal to open or close a circuit. They’re often used for conveyor systems and elevators. Each actuator style is compatible with all housing styles and vice versa.

Switches


Screw Terminal Connection	4-Pole Micro M12 Connection

Polypropylene Housing—Switches with a polypropylene housing are lighter in weight than metal switches.

Zinc Housing—Switches with a zinc alloy housing are more durable than those with a plastic housing.

4-Pole Micro M12 Connection—Switches with a 4-pole micro M12 plug quickly connect and disconnect from your setup. Use cords (sold separately) to wire your switch connection to your setup.

2 Conduit Connections—Switches with 2 conduit connections allow you to wire switches side by side, so you can save space and simplify your wiring.

IP65 Enclosure Rating—IP65 switches protect against dust and splashing water.

IP66 Enclosure Rating—IP66 switches protect against dust and washdowns.

IP67 Enclosure Rating—IP67 switches protect against dust and temporary submersion.

	Switches																	Cords
								Housing			Conduit
	No. of Circuits Controlled	Switch Starting Position	Switch Action	Switch Designation	Switching Current @ Voltage	Max. Voltage	No. of Terminals	Lg.	Ht.	Dp.	No. of Connections	Thread Size	Enclosure Rating	Specs. Met	Certification		Each		Each
Polypropylene Housing







				Screw Terminal Connection

				2	1 Off and 1 On	Momentary	DPST-1NO/1NC	6 amp @ 240V AC, 3 amp @ 24V DC	400V AC 400V DC	4	1.2"	2.7"	1.3"	1	M20	IP65	EN 50047	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	000000	———	0


				2	1 Off and 1 On	Momentary	DPST-1NO/1NC	6 amp @ 240V AC, 3 amp @ 24V DC	400V AC 400V DC	4	1.6"	3.1"	1.5"	1	M20	IP66, IP67	EN 50041	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	00000	———	0
				2	1 Off and 1 On	Momentary	DPST-1NO/1NC	6 amp @ 240V AC, 3 amp @ 24V DC	400V AC 400V DC	4	2"	2.1"	1.3"	2	M20	IP66, IP67	EN 50047	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	000000	———	0




						4-Pole Micro M12 Connection

						2	1 Off and 1 On	Momentary	DPST-1NO/1NC	4 amp @ 240V AC, 3 amp @ 24V DC	250V AC 250V DC	—	1.2"	2.7"	1.3"	—	—	IP65	EN 50047	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	000000	0000000	000000


						2	1 Off and 1 On	Momentary	DPST-1NO/1NC	4 amp @ 240V AC, 3 amp @ 24V DC	250V AC 250V DC	—	1.6"	3.1"	1.5"	—	—	IP67	EN 50041	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	000000	0000000	00000


						Zinc Housing







										Screw Terminal Connection

										2	1 Off and 1 On	Momentary	DPST-1NO/1NC	6 amp @ 240V AC, 3 amp @ 24V DC	400V AC 400V DC	4	1.2"	2.7"	1.3"	1	M20	IP66, IP67	EN 50047	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	000000	———	0


										2	1 Off and 1 On	Momentary	DPST-1NO/1NC	6 amp @ 240V AC, 3 amp @ 24V DC	400V AC 400V DC	4	1.6"	3.1"	1.4"	1	M20	IP66, IP67	EN 50041	UL Listed, C-UL Listed, CE Marked, CCC Marked	0000000	000000	———	0

Frame-Mounted Safety Switches

Key Shown Actuating from the Side


Style A	Style B	Style C	Style E	Style F

Also known as interlock switches, these ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. Mount the switch to the door frame and mount a key to the door so that the key is inserted into the switch when the door is closed. When the door opens, the key is removed from the switch and the machine shuts down. They’re often used with machine guards for large robots.

Styles A-F—Style A-G switches have positive-force, normally closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick.

IP67 Enclosure Rating—IP67 rated switches protect against temporary submersion.

NEMA 4 Enclosure Rating—NEMA 4 rated switches protect against washdowns.

NEMA 6 Enclosure Rating—NEMA 6 rated switches protect against both temporary submersion and washdowns.

Key Included—All switches require an actuator key, but not all include one—check whether you need to pick out a separate actuator key. For some switch styles, you can also select the mounting orientation of the key.

									Housing			Conduit
	Style	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Switch Designation	Switching Current @ Voltage	Max. Voltage	Ht.	Wd.	Dp.	Trade Size	Thread Size	Thread Type	Key Included	Enclosure Rating		Each
Wire Lead Connection with Positive-Force Normally Closed Contacts



		A	2	1 Off and 1 On	Maintained	2	DPST-1NO/1NC	8 amp @ 120V AC, 4 amp @ 24V DC	250V AC 24V DC	3.3"	1.2"	1.2"	—	M16	Metric	Yes	IP67	00000000	0000000


		Screw-Terminal Wire Connection with Positive-Force Normally Closed Contacts



				B	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	5 amp @ 120V AC, 2 amp @ 24V DC	500V AC 250V DC	3"	1"	1.1"	1/2	—	NPT	Yes	IP67, NEMA 6	00000000	000000


				C	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	10 amp @ 120V AC, 2 amp @ 24V DC	250V AC 24V DC	3.6"	2.1"	1.3"	1/2	—	NPT	Yes	IP65, NEMA 4	00000000	000000
				E	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	8 amp @ 230V AC, 5 amp @ 24V DC	400V AC 24V DC	4.2"	2"	1.6"	—	M20	Metric	No	IP67	00000000	00000
				F	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	2 amp @ 400V AC	400V AC	4.4"	1.6"	1.6"	—	M20	Metric	No	IP67	000000000	000000
				F	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	2 amp @ 400V AC	400V AC	4.4"	1.6"	1.6"	1/2	—	BSPP	No	IP67	000000000	000000
				F	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	2 amp @ 400V AC	400V AC	4.4"	1.6"	1.6"	1/2	—	NPT	No	IP67	000000000	000000

Actuator Keys


Straight	90° Angle	Flexible

Flexible—Flexible keys pivot at least 15°, making them easier to align with switches during installation.

				O'all, mm
	For Style	Angle Range	Adjustment Direction	Lg.	Wd.	Mounting Fasteners Included		Each
Straight



		E	—	—	80	32	No	00000000	000000


		F	—	—	53.7	52.4	No	000000000	00000


		90° Angle



				E	—	—	65.5	32	No	00000000	00000


				Flexible



						F	0° to 18°	Left/Right	80.7	40	No	000000000	00000

Heavy Duty Limit Switches

Rugged enough for mining operations, these limit switches require a high actuation force, like heavy rocks moving on a conveyor. They open and close a circuit as quickly as a snap-acting switch but have a larger actuator for larger objects. The roller on the end of the lever arm reduces friction to prevent wear and tear on the switch. Rated NEMA 4 and 13 as well as IP67, these switches are protected from dirt, oil spraying, and temporary submersion.

To determine if you need a right or left actuation direction, stand facing where you'll put the switch. If objects will be passing to the right, you'll need a right actuation direction. If they'll be passing to the left, you'll need a left actuation direction.

													Housing
	Actuation Direction	No. of Circuits Controlled	Switch Starting Position	Switch Action	Switch Designation	Switching Current @ Voltage	Max. Voltage	Actuation Torque, in·ozf	Operating Temp. Range, ° F	Actuator Ht.	For Max. Cable OD	No. of Terminals	Lg.	Ht.	Dp.	Housing Material	Enclosure Rating		Each
Roller Lever Actuator







				Screw-Terminal Wire Connection

				Right	2	1 Off and 1 On	Momentary	DPST-1NO/1NC	20 amp @ 120V AC, 5 amp @ 120V DC	600V AC 600V DC	150	-10 to 185	5.7"	0.5"	4	2.3"	5"	2"	Aluminum	NEMA 4, NEMA 13, IP67	0000000	0000000